MSC1209 Datasheet | OKI Electric

DESCRIPTION The MSC1209 is a Bi-CMOS display driver for a 1/2-duty vacuum fluorescent display tube. The MSC1209 consists of an 84-bit shift register, an 84-bit latch circuit, a 10-bit digital dimming circuit, 42-bit segment drivers, a 2-bit grid circuit, and a cascade control circuit. The MSC1209 is interfaced with a microcontroller by using three signal lines of LOAD, CLOCK, and DATA. The cascaded MSC1209 ICs can share LOAD, CLOCK, and DATA. FEATURES - Power supply voltage: 8V to 18V (Built-in 5V regulator for logic) - Operating temperature range: - 40 to +105°C - Driving 42 segments directly: VOH=VDD- 0.5V at IOH=- 3.0m A (VDD=15.0V) - Built-in digital dimming circuit 10-bit resolution Programmable in the duty range of 0/2048 (0%) to 1016.5/2048 (49.6%) - 3 interfaces with microcontroller: LOAD, CLOCK, DATA - Cascade connection available (The cascaded MSC1209 ICs can share LOAD, CLOCK, and DATA.) - Built-in oscillation circuit with an external capacitor (a single pin is used) - Built-in power-on reset circuit - Package: 56-pin plastic QFP (QFP56-P-910-0.65-2K) (Product name: MSC1209GS-2K) 1/15 ¡ Semiconductor .. BLOCK DIAGRAM GRID1 GRID2 SEG1 SEG42 2-bit Grid Driver VDD VSS Voltage Regulator 5V 5V POR 42-bit Segment Driver VDD=8 to 18V Level Shifter VCC=5.0V (Regulator) BLANK MODEA Timing Generator Multiplexer POR OSC OSC 10-bit Digital Dimming POR L 10-bit Latch 84 bits MODEB LOAD LOAD Timing Control 10-bits (Q1 to Q10) POR DATA CLOCK D 2-bit S/R D Q1-Q84 84-bit Shift Register 84-bit Latch SEL 2/15 ¡ Semiconductor .. INPUT AND OUTPUT CONFIGURATION - Schematic Diagram of Logic Portion Input - Schematic Diagram of Logic Portion Input Circuit 1 Circuit 2 VDD (5V Reg.) VDD (5V...